[GHC] #1901: 6.8.1 incorrectly infers contexts from pattern matches.

[GHC]

#1901: 6.8.1 incorrectly infers contexts from pattern matches.
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 Reporter:  guest     |          Owner:         
     Type:  bug       |         Status:  closed 
 Priority:  normal    |      Milestone:         
Component:  Compiler  |        Version:  6.8.1  
 Severity:  normal    |     Resolution:  invalid
 Keywords:            |     Difficulty:  Unknown
 Testcase:            |   Architecture:  Unknown
       Os:  Unknown   |  
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Comment (by guest):

 OK. I would submit that the section of the user manual I pointed to is
 confusing, then, because it certainly gives the impression that it's valid
 haskell98 :)

 However, bearing that in mind, shouldn't the program be rejected unless
 some appropriate extension is turned on?

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1901#comment:2>
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